Multiple heating-burner for vaporized liquid combustibles.



PATENTE'D DEC. 3, 1907.

M. FRIBDMANN & R. KNOLLER MULTIPLE HEATING BURNER FOR VAPORIZED LIQUIDGOMBUSTIBLES.

APPLICATION FILED AUG, 3, 1906.

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nNiTn ti sTaTns TNT onion MAX FRIEDMANN, OF VIENNA, AUSTRIA-HUNGARY, ANDRICHARD KNOLLER, OF PANTIN,

FRAN OE.

MULTIPLE HEATING-BURNER FOR VAPORIZED LIQUID COMBUSTIBLES.

Specification of Letters Patent.

, Patented Dec. 3, 1907.

Application filed August 3.1906. Serial No. 329,116.

To all whom it may concern:

Be it known that we, MAX FRIEDMANN, a subject of the Emperor ofAustriaHungary, residing at Vienna, Austria-Hungary, and RICHARDKNOLLER, subject of the Emperor of Austria-Hungary, residing at Pantin,in the Department of Seine, France, have invented certain new and usefulImprovements in Multiple Heating-Burners for Vaporized LiquidCombustible, of which the following is a specification.

This invention relates to a multiple burner for vaporized liquid fuel,for heating boilers the consumption of fuel by which burner can bevaried between very wide limits. In order to extend the limits withinwhich the consumption of such burners can be varied, it has beenproposed to employ several separate burners arranged side by sideopening into the same combustion chamber, each such burner beingprovided with a vaporizing pipe coil, or all having a vaporizing coil incommon. With such an arrangement it would be sufficient to shut off acertain number of the separate burners, and only to leave one or two inaction, in order to reduce the consumption to a minimum. Such multipleburners have given good results in combustion chambers in which asufficiently strong draft is produced by a chimney or other device. Ifhowever such burners require to force the combustible mixture underpressure into the combustion chamber the above described arrangementcannot be used. l/Vhen working according to the said method with themultiple burners, detrimental action would occur because, by thepressure produced in the combustion chamber by the burners remaining inaction, a striking back of the flame through the nozzles of the burnersthat are out of action would take lace. Besides a restarting of aburner,that 1s out of action (which is already difficult on account of thecooling down thereof) is rendered still more difficult owing to the saidbackward pressure requiring to be overcome. Furthermore, if there existsan inequality in the feed of the burners, this inequality is increasedby the presence of the said pressure in the combustion chamber so as tohinder the proper working of the insufliciently fed burners.

These disadvantages are obviated according to the present invention inthat the suction nozzles or ejectors, each of which is fed by acombustible vapor nozzle, are arranged inclined at a suitable angle toeach other and enter a mixing nozzle, common to all, at a point wherethe decrease of pressure in the mixing nozzle is greatest. Inconsequence of this arrangement, on shutting off several of the separateburners, the suction action produced by the burners remaining in actionwill also produce a suction through the closed burners, wherebyanybackflash of the flame is prevented. The restarting of the separateburners can in this case be readily effected because in consequence ofthe convergence of the suction nozzles the flames are directed towardsone and the same point, where the vaporizer is situated, so that this isalways heated to the required extent, even when only one or two separateburners are in action. The reignition can also be readily effectedbecause in consequence of the con vergence of the nozzles the unignitedgas jets meet those that are ignited. In the axis of the mixing nozzleand at a certain distance from the same may be arranged a flame divider,constituted by a nozzle or tube which receives the central part of theflame jet which is rich in combustible, whereby the permanence of thezone in which the combustion begins is insured and a uniform heating ofthe vaporizer is effected. This flame divider can have either a singleopening or several openings for taking up the middle parts of the flamesissuing from the several ejector nozzles.

On the accompanying drawing is shown by way of example a double burnerconstructed according to this invention, the two converging ejectornozzles of which lie in the same plane.

Figure 1 shows a sectional plan of the burner. Fig. 2 shows the flamedivider,viewed from the end directed towards the mixin nozzle. Fi s. 3and 4 show in horizonta longitudina section and in end view a modifiedconstruction of the flame divider with two end openings and paralleltubular parts. Figs. 5 and 6 show in horizontal section and end viewanother form of flame divider in which the two tubular parts areentirely separate and are arranged at a certain angle to each other.

a a are the two conical suction nozzles of the double burner, whose axesare arranged at a slight angle to each other. These two suction nozzlesopen into the same mixing nozzle 5, through air suction openings 0. Thismixing nozzle is formed slightly conical and the two suction nozzles a apenetrate into the mixing nozzle to about the narrow est part thereof atwhich the greatest reduction of pressure exists.

The mixing nozzle 1) projects into the combustion chamber and in theaxis thereof is arranged a flame divider e at a certain distance fromthe discharge opening of the mixing nozzle, the opening of which flamedivider directed towards the mixing nozzle may be of an oblong sectionas at-Fig. 2. This flame divider' has a backwardly expanding extensionin the axis of which is an impact body f consisting of a conical frustumg which is open at the front narrowest end and is closed at the otherend by a suitable plate. Round the flame divider is arranged thevaporizer h in the form of a pipe coil, the one end of whichis connectedto the branch pipes j j of the pipe 'i supplying the combustiblenozzles.

The action of the above described apparatus is as follows :When workingnormally the two branches y" j are both fed with combustible and themixture of vaporized combustible and airdrawn in through the twoejectors a a is forced under pressure into the combustion chamber, whereit burns both within and round the flame divider. If by means of asuitable closing device such as a valve 7c the combustible supply to thebranch 7' be out off and only the branch j and nozzle a of the burnerremain in action, the reduction of pressureat the inlet part of themixing nozzle thus produced prevents all striking back of the flameintothe ejector nozzle a. As already stated the re-starting can be readilyeffected because the gas jet from the nozzle a burns ata point'which issymmetrical relatively to the vaporizer so that this is always uniformlyheated. On the other hand the ignition can also be readily effectedbecause the converging gas jets im ingeupon each other.

11 Fig. 2 the frame divider e is shown as having the opening in the'endadjacent to the mixing nozzle in the form of two circles Z and Z merginginto each other or connected to produce an oblong aperture.

In the modification shown at Figs. 3 and 4 the flame divider is formedwith two separate small tubular parts, Z 1*, which oin on to the otherpart of the divider. In the arrangement at Figs. 5 and 6 the two tubularparts Z Z are arranged at an angle to each other, in the axial lines ofthe ejector nozzles a a so that the reception thereby ofthe centralparts of the gas jets which are rich in combustible is facilitated.

It will be obvious that the several elements of the multiple burner canbe arranged one above the'other in a vertical plane, or round in acircle.

Claims:

1. In a burner of the class specified, the combination of a combustionchamber, a mixing nozzle projecting into the combustion chamber, apluralityof suction nozzles projecting into the outer end of the mixingnozzle and converging towards each other, means for feeding gaseous fuelto the nozzles and provided with separate branch nozzles individuallyextending into the said suction nozzles, and a flame divider arranged inadvance of theinner end of the mixing nozzle.

2. In a burner of the class specified, the combination of a combustionchamber, a mixing nozzle projecting into the combustion chamber anddiametrically reduced towards its outer end, conical suction nozzleshaving their reduced ends projecting into the mixing nozzle, the suctionnozzles opening into the mixing nozzle at its narrowest point Where thereduction of pressure in the said at the'end facing the mixing nozzleone or more openings and at the opposite end an impact body having theform of a conical frustum.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

MAX FREIDMANN. Witnesses:

JosEF Rt'iBREscH,

ALvEsro S.'I-IOGUE.

In witness whereof I have hereunto signed my name this 21 day of July,1906, in the presence of two subscribing witnesses.

RICHARD KNOLLER. Witnesses:

MAROEL ABMENGAUD, Jeune, HANSON O. Ooxn.

-mixing nozzle is about the greatest, means

